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91. A Humidity Generator for Temperatures to 200 °C and Pressures to 1.6 MPa
Topic: Chemistry
Published: 11/30/2012
Authors: D Vega-Maza, W Wyatt Miller, Dean C Ripple, Gregory E Scace
Abstract: We have constructed a new humidity generator that produces gas streams of known moisture content at temperatures from 85 °C to 200 °C, absolute pressures from 0.2 MPa to 1.6 MPa, and relative humidities from 10 % to 90 %. The generator produces a moi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905234

92. Mitigation of Autogenous Shrinkage in Alkali Activated Slag Mortars by Internal Curing
Topic: Chemistry
Published: 11/19/2012
Authors: Aaron Richard Sakulich, Dale P Bentz
Abstract: Alkali activated slag shows considerable promise as an environmentally friendly alternative to binders produced from ordinary portland cement (OPC). The shrinkage behavior of alkali activated slags, however, is not well understood, and is a hurdl ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911271

93. Modeling Chloride transport in Cracked Concrete: A 3-D image-based microstructure simulation
Topic: Chemistry
Published: 10/3/2012
Authors: Edward Joseph Garboczi, Dale P Bentz, Jeffrey M Davis, Yang Lu
Abstract: The prediction of the service life of concrete materials is difficult, mainly because of their complex heterogeneous microstructure and their random nature. Studying the presence of cracks in concrete and their effect on chloride transport and reacti ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912153

94. Biosynthesis of Athmu, a alpha,gamma-hydroxy-ß-amino acid of pahayokolides A-B
Topic: Chemistry
Published: 10/2/2012
Authors: Li Liu, Daniel W Bearden, Juan C. Rodriguez, Kathleen S. Rein
Abstract: Pahayokolides A-B are cyanobacteria derived non-ribosomal peptides which exhibit cytotoxicity against a number of cancer cell lines. The biosynthetic origin of the 3-amino-2,5,7,8- tetrahydroxy-10-methylundecanoic acid (Athmu) moiety has been inv ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912206

95. A 4:1 transmission-line impedance transformer for broadband superconducting circuits
Topic: Chemistry
Published: 10/1/2012
Authors: Leonardo Matteo Ranzani, Lafe F. Spietz, Jose Alberto Aumentado, Zoya Popovic
Abstract: We present a 4 : 1 superconducting transmission-line impedance transformer for cryogenic applications. The device transforms 25 {Omega} in the coplanar waveguide to 6.25 {Omega} in the microstrip and is designed to operate at 20 mK. Calibrated me ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910366

96. Guidelines for Access Control System Evaluation Metrics
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7874
Topic: Chemistry
Published: 9/14/2012
Authors: Chung Tong Hu, Karen Scarfone
Abstract: The purpose of this document is to provide Federal agencies with background information on access control (AC) properties, and to help access control experts improve their evaluation of the highest security AC systems. This document discusses the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911110

97. Measurement of Scattering Cross Section with a Spectrophotometer with an Integrating Sphere Detector
Series: Journal of Research (NIST JRES)
Report Number: 117.012
Topic: Chemistry
Published: 9/13/2012
Authors: Lili Wang, Steven J Choquette, Yu-Zhong Zhang, Victoria Karpiak, Adolfas Kastytis Gaigalas
Abstract: A commercial spectrometer with an integrating sphere (IS) detector was used to measure the scattering cross section of microspheres. Analysis of the measurement process showed that two measurements of the extinction, one with the cuvette placed i ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909272

98. An Argument for Virtual Testing in the Cement Plant
Topic: Chemistry
Published: 9/10/2012
Authors: Pichet Sahachaiyunta, Kittisak Pongpaisanseree, Jeffrey W Bullard, Paul E Stutzman, Edward Joseph Garboczi, Wilasa Vichit-Vadakan
Abstract: The cement industry is moving toward customized commodity products, requiring plants that were built to consistently produce thousands of tons of one product each day to now be versatile enough to fine-tune multiple products that meet both industry ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910639

99. Relating Compressive Strength to Heat Release in Mortars
Topic: Chemistry
Published: 9/4/2012
Authors: Dale P Bentz, Tim Barrett, Igor de la Varga, William Jason Weiss
Abstract: Conventionally, isothermal calorimetry and ASTM C186 heat of hydration results are reported on a per mass of cement (powder) basis, with typical units being J/g cement for example. Based on the recognition that it is the filling of porosity with hyd ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910338

100. Usability of PIV Smartcards for Logical Access
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7867rev2012
Topic: Chemistry
Published: 8/31/2012
Authors: Mary Frances Theofanos, Emile L Morse, Hannah Wald, Yee-Yin Choong, Celeste Paul, Aiping L Zhang
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911843



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